Picture frame



FIG. 1 is a front elevational view of a picture frame showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a cross-sectional view thereof taken along line 5--5 in FIG. 1. 

The ornamental design for a picture frame, substantially as shown. 